ART TPS II, 2-Channel Tube Microphone Preamplifier, With hand-selected 12AX7A tube, Variable input impedance, Automatic switching between instrument and mic input, Over 120 dB dynamic range, LED input meter and 2 analogue VU meters, Frequency response: 5 - 50,000 Hz, +48V phantom power, Built-in limiter, Phase reversal switch, +20 dB switch, Presets for EQ and limiter settings, XLR and jack connectors, Construction: 19